Boiler drum



Aug. 29, 1933. I. HARTER 1,924,279

BOILER DRUI Original Filed March 12. 1927 2 Sheets-Sheet 1 INVENTOR Isa/1c HHRTER ATTORNEYS Patented Aug. 29, 1933 TES BATE

. BOILER DRUM Isaac Harter, ,New York, N. Y., assignor to The Babcock & Wilcox Company, Bayonne, N. J., a

V Corporation of New Jersey Application Marchlz, 1927, Serial No. 174,887 Renewed September 29, 1931 r 7 Claims.

smaller than the cover, and relates further to methods of making the covers. to be set forth covers a modification of the struc-' ture and methods disclosed'in my copending application filed September 9, 1926, Serial No. 134,513. t

Various suggestive embodiments ofmy present invention are illustrated in the accompanying drawings in which Figure 1 is a longitudinal section through the end of a seamlessdrum closed by the cover of my invention; Fig. 2 is "a plan view of the cover; Fig. 3 is a sideview of the cover; Figs. 4 and 5 are plan and side views, respectively, of a modificationpFigs. 6 and 7-are plan and side views, respectively, of another modification; and Figs. 8 and 9-are plan and side views, respectively, of a third modification;

- Like reference characters indicate like parts in the several views.

The drumA may be made as shown. in my earlier application,- above referred to, by heating and turning in or closing in the ends of a seamless shell, while hot, to form the relatively small circular manhole opening 10 serving as its largest opening; The vmethodsqdisclosed in my earlier application do. not work well with short drums. The-covers get hot when placed inside a short drum before forming the reduced ends and may be damaged or distorted so as not to seal tightly against the seat or ledge 11 around the opening 10. In the embodiment shown in Figs. 1' to 3,

therefore, I make the metal cover B in two parts 12, each small enough to enter the manhole 10in the drum. These parts can be readily assembled within the drum and then fabricated, as'by being welded, into an integral unit after the drum is otherwise completed.

As shown in Figs. 2 and 3, these parts are identical halves meeting in a central diametral plane. They may be of cast or forged metal and require no machine finishing except possibly on a face 13 of a flange 14 which bears against the ledge 11 surrounding the manhole 10, .to, provide an accurate fit between this face and the seat. It may be also desirable to machine the abutting faces'16 of the parts 12. Cored or drilled bolt holes 17 extend through each portion 12 and end in sockets 18, large enough to hold the head of the bolt 19 or its nut 20. Dowel pins 22 fit closely in holes 23 to positively align the portions The invention 12 to insure a register of the parts of the 13 and of the machined surfaces 16. I t I The diametral face 16, ofeach. portion, ends at its;longer edges in surfaces 25 and 26, each set back, and sloping away from theface 16. This gives, when the cover is assembled,an efiect of diametrically disposed and relatively deep wedgeshaped slots 27 and 28 on opposite faces of the cover, B. These slots are later filled with metal electrically deposited, thermit metal, or any suitable welding substance. The parts; are-thus welded within the drum A to form the integral cover B. Any suitable method of welding may be .used to make the covers integral,

Standing bolts 30 extendfrom theexterior'face of the cover to retain the cover inplace the.

" manhole with the ledge, 11 pressing against any suitable gasket to make a tight joint thatwill withstand thesteamipressure from within the drum. The bolts 30 secure thecover to the-usual N o -l -E if face bars or cross pieces 31*spann'ing or bridging. the I manholelO to rest at-their ends on=thedrum A.

A hinge section 32 ,is boltedto the interior face V V of the cover .3 and retained by links-'34 and; 35

to a hinge section 36 bolted to the druminterior.

C are much the same as B. A-fiat plate 38-just small enough to enter the-manholelois b'olted,

cover D are not alike. The central plane surface 42 of part 41 ends in a rib or flange 43 which fits in a corresponding or complementary recess 44in'the part 40. The parts of the cover are joined and brought into registry by dowels 22. The cover is bolted into a rigid unit by bolts passing through the flange 43 and entering the part 40. The cover is completed by filling the slot 27 in the inner face of the cover Dwith a welding substance.

In Figs. 8 and 9 the cover E is composed of two unlike parts 46 and 47. The part 47 has a dovetail rib 48 fitting slidingly into a complementary slot in the part 46. Diametral slots. 50 and 51, similar-to those in cover B, are formed in the inner and outer faces, respectively, of the cover E to permit a welding of the parts 46 and 47 into a unitary cover. A set screw 53 locks the parts In Figs. 4 and 5. the ,twoparts 37'of the-cover In Figs. 6 and 7 the two parts 40 and 41 of the in proper registry. The welding operation completes the cover filling the opposed slots and 51 with metal or other welding material.

It will be noted that, in the case of each variation or modification, the bolts and dowels are protected from the hot welding operation. In

every cover the welding slots are not made so deep as to be dangerously near the-fastening means;

that is, the meeting surfaces of the parts of each cover are of such extent that the heat cannot reach the bolts and dowels andthus spoil the cover by warping them and the cover out of shape. 7

It will be apparent that the use of this cover and method of construction is not limited to seamless drums but is applicable wherever an integral cover is placed within a hollow body to fit an opening smaller "than the cover. Any combination or arrangement of fastening means may be used as desired.

I claim: Y

'1; A cover for fitting an'opening in a drum from within the drum'and comprising a plurality of component parts having contacting faces, dowel pins disposed in holes, in said faces, said parts 'being welded together to form an integral cover,

and meansfor' attaching the cover to a drum.

2. 'In combination, a forged metallic high-pressuredrum having therein a substantially circular hole surrounded by a seat facing thelinterior of the drum; and a substantially'circular unitary cover'disposed on the inside of the drum and adapted to fit said seat, said cover'consisting of a plurality'of component parts each of which'is small enough'to'pass freelythrough said hole and said component parts having been passed through saidhole into said drum and there fabricated into a unitary operative cover..

- 3'. In combination, a forged metallic high-pressure drum' having therein asubstantially circular jhole surrounded bya seat facing the'interior of the drum and a substantially circular unitary cover disposed on the inside of the drum and adapted to fit said seat, said'cover consisting of a plurality of component parts each of which is small enoughto pass freely through said hole and' said component parts having been passed through said hole into said drum and there welded into a unitary operative cover.

' 4; Incombination', a forgedmetallic high-pressure drum having therein a substantially circular hole surrounded'by a seat facing the interior of the drum, 7 and. a;substantially circular unitary registry of the cover. with said seat, and means 1 cover disposed on the inside of the drum and adapted to fit said seat, said cover consistingof a plurality of component parts each of which is small enough to pass freely through said hole, said component parts having been passed through said hole into said drum and there fabricated into a unitary operative cover, and saidparts-having thereon'means for positively aligning them to insure anaccurate registry of the cover with said seat.

5. In combination, a forged metallic high-pressure drum having therein a substantially circular holesurrounded by a seat facing the interior of the drum, a substantially circular unitary cover disposed on the inside of the drum and adapted to fit said seat, said cover consisting of a plurality of component parts each of which is small enough the drum, a substantially circular unitarycover disposed on the inside of the drum and adapted tofit said seat, said cover consisting of a plurality of component partsgeach of which is small enough topass freely through said hole, said component 1 parts having been passed through said hole into said drum and there fabricated into a unitary operative cover and said parts having thereon means for positively aligning them to insure anaccurate 1 registry of the cover with said seat, and 'means 1 forholding said coveron said seat.-v g :7. In combination, a forged metallic high-pressure drum having therein a substantially circular hole' surrounded by a seat facing the interior of 1 the-drum, asubstantially circular 'unitary cover disposed on the inside of the drum and adapted to fit said seat; said cover consisting of a plurality of component parts each of which is small enough to pass freely through said hole, said component parts having been passed through saidhole into said drum and there welded into a unitary operative cover and said parts having thereon means for positively aligning them to insure an accurate for holding said cover on said seat.

ISAAC I-IARTERQ' 

